<html>
  <head>
    <meta http-equiv=Content-Type content="text/html;charset=utf-8">
    <meta http-equiv=X-UA-Compatible content="IE=edge,chrome=1">
    <meta content=always name=referrer>
    <title>OpenLayers 3地图示例</title>
    <link href="../ol3.13.1/ol.css" rel="stylesheet" type="text/css" />
    <script type="text/javascript" src="../ol3.13.1/ol-debug.js" charset="utf-8"></script>
    <style>
      .ol-popup {
        position: absolute;
        background-color: white;
        -webkit-filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
        filter: drop-shadow(0 1px 4px rgba(0,0,0,0.2));
        padding: 15px;
        border-radius: 10px;
        border: 1px solid #cccccc;
        bottom: 12px;
        left: -50px;
        min-width: 280px;
      }
      .ol-popup:after, .ol-popup:before {
        top: 100%;
        border: solid transparent;
        content: " ";
        height: 0;
        width: 0;
        position: absolute;
        pointer-events: none;
      }
      .ol-popup:after {
        border-top-color: white;
        border-width: 10px;
        left: 48px;
        margin-left: -10px;
      }
      .ol-popup:before {
        border-top-color: #cccccc;
        border-width: 11px;
        left: 48px;
        margin-left: -11px;
      }
      .ol-popup-closer {
        text-decoration: none;
        position: absolute;
        top: 2px;
        right: 8px;
      }
      .ol-popup-closer:after {
        content: "✖";
      }
    </style>
  </head>
  <body>
    <div id="map" class="map"></div>
    <div id="popup" class="ol-popup">
      <a href="#" id="popup-closer" class="ol-popup-closer"></a>
      <div id="popup-content"></div>
    </div>
    <script>
      /**
       * Elements that make up the popup.
       */
      var container = document.getElementById('popup');
      var content = document.getElementById('popup-content');
      var closer = document.getElementById('popup-closer');


      /**
       * Create an overlay to anchor the popup to the map.
       */
      var overlay = new ol.Overlay(/** @type {olx.OverlayOptions} */ ({
        element: container,
        autoPan: true,
        autoPanAnimation: {
          duration: 250
        }
      }));


      /**
       * Add a click handler to hide the popup.
       * @return {boolean} Don't follow the href.
       */
      closer.onclick = function() {
        overlay.setPosition(undefined);
        closer.blur();
        return false;
      };


      /**
       * Create the map.
       */
      var map = new ol.Map({
        layers: [
          new ol.layer.Tile({
            source: new ol.source.TileJSON({
              url: 'http://api.tiles.mapbox.com/v3/' +
                  'mapbox.natural-earth-hypso-bathy.json',
              crossOrigin: 'anonymous'
            })
          })
        ],
        overlays: [overlay],
        target: 'map',
        view: new ol.View({
          center: [0, 0],
          zoom: 2
        })
      });


      /**
       * Add a click handler to the map to render the popup.
       */
      map.on('singleclick', function(evt) {
        var coordinate = evt.coordinate;
        var hdms = ol.coordinate.toStringHDMS(ol.proj.transform(
            coordinate, 'EPSG:3857', 'EPSG:4326'));

        content.innerHTML = '<p>You clicked here:</p><code>' + hdms +
            '</code>';
        overlay.setPosition(coordinate);
      });
    </script>
  </body>
</html>
